Short: Working Timer. Working SPI. SPI does not work when triggered by timer_handler.
Hello,
I am currently trying to replace delays with timer in my code...
I set up a working timer that goes off every 4 seconds. In the handler that is called I would like to call the function that initiates a measurement and then gets the values afterwards. It does not work in combination. Debugger stops at if (p_spi_instance->disable_all_irq) in the SPI routine. (Flag is not set btw).
If I log via UART instead of any value it only outputs 0.
//Edit:
static void test_timer_handler(void * p_context)
{
UNUSED_PARAMETER(p_context);
printf("Hallo\n");
hole_temperatur();
}
When I call this function from within the timer handler:
static int32_t hole_temperatur(void)
{
if (m_transfer_completed)
{ // ADC Temperatur 256 Aufloesung
m_transfer_completed = false;
m_tx_data_1B[0] = 0x50;
uint32_t err_code = spi_master_send_recv(SPI_MASTER_0, m_tx_data_1B, 1, m_rx_data_1B, 1);
APP_ERROR_CHECK(err_code);
printf("%d %X %d \n",err_code, m_rx_data_1B[0], m_transfer_completed);
nrf_delay_ms(1);
}
if (m_transfer_completed)
{ //Hole und berechne Temperatur
m_transfer_completed = false;
m_tx_data_4B[0] = 0x00;
m_tx_data_4B[1] = 0xFF;
m_tx_data_4B[2] = 0xFF;
m_tx_data_4B[3] = 0xFF;
uint32_t err_code = spi_master_send_recv(SPI_MASTER_0, m_tx_data_4B, 4, m_rx_data_4B, 4);
APP_ERROR_CHECK(err_code);
printf("%d \n",err_code);
nrf_delay_ms(1);
printf("%X \n",m_rx_data_4B[1]);
//printf("%X \n",m_rx_data_4B[2]);
//printf("%X \n",m_rx_data_4B[3]);
D2 = m_rx_data_4B[1]<<16 | m_rx_data_4B[2]<<8 | m_rx_data_4B[3];
//printf("%d \n",D2);
//printf("%s \n", m_transfer_completed ? "true" : "false");
dT = (int32_t)D2 - ( (int32_t)Koeff[5] * 256 );
T = 2000 + ((int64_t)dT * Koeff[6]) / 8388608LL;
} return T = (int32_t)T;
}
It outputs "0 FE 0" So no error. Expected Read Result but transfer not completed! I removed the static from the variable declaration but that didn't help. The flag is meant to be set inside the spi_master_event_handler.
When I remove the if(transfer_completed) from the //Hole und berechne Part I only receive a capital H every 4 seconds. (The "Hallo" is also gone missing)
Well it looks like it is the H from Hallo. With the hallo-printf statement excluded I aint got nothin'.
How else could I realize this? All I could think of is just setting a flag in the timer_handler and check for this in the main()-loop and then execute the code from here. But that wouldn't help me with current consumption, would it? This would also keep the chip awake or would this be better than using delay?
timer_handler {test_flag=true}
for (;;)
{
power_manage();
if(test_flag) { printf("%d \n",hole_temperatur()); test_flag=false;}
}
